Machine for making paper cups



Feb. 3, 1948. M, HARVEY 2,435,308

MACHINE FOR MAKING PAPER CUPS Filed Dec. 17, 1942 I 12 Sheets-Sheet l i-mzz/ Feb. 3, 1948. L. M. HARVEY 2,435,308

MAdHINE FOR MAKING PAPER CUPS Filed Dec. 17, 1942 12 Sheets-Sheet 2 //7 renfor' l-eo f2 Harvey fi/forney Feb, 3, 1948.

L. M. HARYEY 2,435,308

MACHINE FOR MAKING PAPER CUPS Filed Dec. 17, 1942.

12 Sheets-Sheet 3 //7 yen for Aea-M (fa/veg Feb. 3, 1948.

L. M, HARVEY MACHINE FOR MAKING PAPER CUPS Filed Dec. 17, 1942 12 Sheets-Shet 4 Feb. 3, 1948.

| M. HARVEY 2,435,308

MACHINE FOR MAKING PAPER CUPS Filed Dec. 17, 1942 12 Sheets-Sheet 5 Eg Q V (3 Feb. 3, 1948. L. M. HARVEY 2,435,308

MACHINE FOR MAKING PAPER CUPS Filed Dec. 17, 1942 12 Sheets-Sheet 6 A f 53.3 a: 2

Feb. 3, 1948. HARVEY 2,435,308

MACHINE FOR MAKING PAPER CUPS l2 Sheets-Sheet 7 Filed Dec. 17, 1942 WWW Feb. 3, 1948. 1.. M. HARVEY 2,435,308

MACHINE FOR MAKING PAPER CUPS 7 Filed Dec. 17, 1942 12 Sheets-Sheet 8 Mu W a 6,1,

Feb. 3, 1948'. L. M. HARVEY 2,435,303

MACHINE FOR MAKING PAPER CUPS Filed DEC. 1'7, 1942 1.2 Sheets-Sheet 9 I l l I l .l

ms l5 m f a'Mm/w/ Feb. 3, 1948. I fiv 2 ,435,308

MACHINE FOR MAKING PAPER CUPS Filed Dec. 17, 1942 12 Sheets-Sheet l0 Awe/7191" .A 60 f7- f/am qy Feb. 3, 1948. L; M. HARVEY 2,435,308

MACHINE FOR MAKING PAPER CUPS 12 Sheets-Sheet 11 Filed Dec. 1'7, 1942 Feb. 3, 1948. M. HARVEY MACHINE FOR MAKING PAPER CUPS Filed Dec. 17,1942 12 Shets-Sheet 12 birch/8r 180 Patented Feb. 3, 1948 UNITED STATES PATENT OFFICE 15 Claims.

This invention relates to the manufacture of containers, such as paper cups, and has more particular reference to a machine for making paper cups, and the like. A general object of this invenis to provide a practical, dependable and particularly eifective machine for making paper cups.

Another object of this invention is to provide a machine for making paper cups, and the like, in which a continuous strip of paper stock is fed to the machine and novel cutting means at the cup shaping and forming dies cuts a cup blank from the stock immediately preceding each series of operations of the dies, and holds the blank in the central position with respect to the dies. The paper feed means and blank cutting means are synchronized with the die movements and are such that a newly cut accurately centered blank is out and left between the dies immediately prior to each series of die operations.

Another object of this invention is to provide a paper cup machine of the character referred to in which the dies are visible and are readily accessible for replacement by dies of diiferent sizes.

Another object of this invention is to provide a paper cup machine in which the paper stock and the cups formed therefrom are fed across the upper side of a support or table where they are plainly visible and where they do not become soiled by oil or other lubricant. In the machine of the present invention the driving mechanisms, etc, are all housed below the die means so that they may be thoroughly lubricated without danger of soiling the paper or the cups.

Another and. important object of this invention is to provide a machine of the character referred to that may be easily and quickly conditioned to produce cups of any selected size within a very wide range of sizes. A simple adjustment of the paper feed means varies the amount of paper fed to the blank cutting and cup forming mechanism. The active elements of the blank cutting and cup shaping mechanism are easily accessible and are readily replaceable by corresponding elements of different sizes and the cup forming elements are spring held so that the mechanism is adapted to shape cups within a wide range of sizes without altering the stroke of the operating mechanism or otherwise changing the machine. The cup receiving and stacking means embodies readily replaceable elements for receiving and holding the cups as they are stacked one within the other,

Another object of this invention is to provide a machine of the character mentioned that produces strong tight containers having side walls rim lending strength to the side Walls and providing a finished edge, and having a bottom wall strengthened by an annular shoulder.

Another object of this invention is to provide a cup forming machine of the character referred to in which the operation of all of the parts and mechanism may be readily started and stopped by the simple operation of a manual clutch lever and the paper feed means may be manually stopped and then started at will by the simple operation of a roll positioning handle.

Another object of this invention is to provide a cup forming machine that is entirely automatic, operating without the aid or attention of an attendant. The feeding, cutting, cup forming, cup transferrin and cup stacking operations are entirely automatic and are synchronized so that the machine automatically produces cups so long as it is in operation. The feed means is adapted to carry a large supply of paper to provide for the prolonged, continuous operation of the machine.

Another object of this invention is to provide a paper cup machine that has a high production rate and which embodies compact operating or driving mechanisms for operating the several dies, etc.

A further object of this invention is to provide a novel combination and assembly of dies for forming the flutes in the blank, for iving the cup its shape and for forming the head on the cup, which dies are coaxial and in the relation where certain of them telescope one into the other.

The various objects and features of my invention wil be fully understood from the following detailed description of a typical preferred form and application of my invention, throughout which description reference is made to the accompanying drawings, in which:

Fig. 1 is a front elevation of the machine provided by this invention. Fig. 2 is a side elevation of the machine showing the paper supply and feed means. Fig. 3 is an enlarged plan elevation of the machine with the most elevated parts appearing in horizontal cross section. Fig. 4 is an enlarged fragmentary vertical detailed sectional view illustrating the 'die means in the operated condition and showing adjacent parts of the machine. Fig. 5 is a view similar to Fig. 4 illustrating the cup ejecting or stacking means, a porticn of the paper feed, means, the scrap cutting means, etc. Fig. 6 is an enlarged longitudinal detailed sectional view of the main clutch of the machine. Fig. 6 is an elevation view of one of the cams of the clutch shown in Fig. 6. Fig. 7

strengthened by folds or pleats, having a rolled is a. transverse detailed sectional view taken as indicated by line 'l--! on Fig. 6. Fig. 8 is an enlarged longitudinal detailed sectional view of a sprocket and clutch assemb'y embodied in the paper feed means of the invention. Fig. 8 is a frag" mentary transverse detailed sectional view of the free running clutch means of the structure shown in Fig. 8. Fig. 9 is an enlarged fragmentary vertical detailed sectional View of a portion of the paper. feed; means. Fig. 1.0. is. an. enlarged. fragmentary, horizontal. detailed sectional view 10 illustrating the cup transferring means, Fig. 11

is a plan view of certain elements of the cup:- transferring means showing the two positions of the cups during the stage transference and illus trating the different positions of the-transferring.

elements. Fig. 12 is a fragmentary vertical detailed sectional view illustrating a portion: of the! means for actuating the cup transferring elements. Fig. 13 is an enlarged fragmentary vertical detailed sectional view showing the mechanism' forbperatingthe cup transferring means. Fig; 13 'is a vertical'detailed sectional view of the adjustable connection between'the walking beam and the"c*ans. Fig. 14' is an enlarged fragmentary' vertical detailed sectional viewilustrating the several means for operatin'gthe dies. Fig. 15

is" an'genlarged fragmentary vertcal' detailed sectional viewtaken as indicated by line !5 5 on Fig: 14'. Fig. 16' is' an'enlarged-fragmentary ver-- tical detailed'sectional view'showing the dies in" the position preceding the bead forming opera-- tion; Fig. 17 is aview similar to Fig. 16 showing thediesin'positionat or near the completion of the-bead; Fig. 18 is 'a diagrammaticview illustrating thepaperfeed means and'the cup transfrringimeans. Fig. 19 is' a. fragmentary, diagrammatic view of the paper feeding'me-ans; Fig. 20 isavertical detailed sectional View ofthe flute forming die removed from the machine. Fig. 21' isa view'simi1arto Fig. 20 ill'ustrating the flute formingpunch. Fig; 22 is a bottom elevation of the'fl'ute forming die. Fig: 23 is a planel'evation ofthe'flute forming punch. Fig. 24 is a vertical sectional viewof 'the' scrap cutting 'mean's apart from the other elements of themac'hine' with certain of the members in side elevation. Fig. 25:15: an enlargedplan view of'acupblank after. the flutes have been formed therein. Fig; 26 is an onlarged' side elevation of the b'lank provided with". the-flutes: Fig. 27is a1side elevationofithe'cup fol-lowing; the flute forming; cupshaping. and ironing operations andFig. 28 is a; fragmentary side elevation of "the completedcup.

The cup forming machin'e' of the present invenetion may be said'to comprise; generally, a sup. porting: and housing'case H), a power means or drive means H for driving or'operating the various mechanisms of" themachine, a paper: feed means I2; a die mechanism l3 which receives the paper'from the feed meansl2 andcuts-iitinto' blanks and forms paper cups therefrom, a cup transferring and stacking meansal 4=for withdraw ing the completed cups from the mechanism' l3; andscrap handlingmeans l5i The case l 0' supports the various; elements of the machine and houses portions of the driving means I l and associatedparts'. The case H] "may bear generally square or'rectangular upright-loom likejstruoture: The opposite sides of-the case 59 are provided with" access openings closed by hinged doors l6, Theitop of the case iii is fiat and horizontal tocarry. certain-elements of the paper.- feed .means l2, the die mechanism l3, etc; 'Iliewallsof the,case. are. closed and sealedjto, prevent the escape of the lubricant for the'driving mechanism, The lower portion of the case l0 may be provided with a suitable base i! adapted to rest on the floor or other support.

In the preferred form of the invention the machine is entirely self-contained and embodies its own power means. In the construction illustrated the power means includes an electric motor M of suitable rating mounted on a bracket IBsecured on a wall of thecase Hi. The motor M is mounted on what I'will term the: rear side of the case It]. The drive means H is characterized by a single crank shaft l9 and all of the working parts of the machine are driven from this-single crank shaft. In the preferred constructionillustrated, the motor M is mounted to have its shaft horizontal and the crank shaft l9 i's' rotatablymount'ed in the lower portion of the .case. H} to be below the shaft of the motor M and" to" extend at right angles to the motor shaft. The crank shaft I9 is rotatably supported by suitable spacedi bearings 23 in the'case. A

clutched worm drive is' provided between the"- motor Mand the crank shaft IS;

The clutched drive includes a flangedmounting plate oricarrier'zl secured to the rear'wallf.

of the case. in by screws;22. and having a hub 23 I which pro ects' freely through: an opening. 25 in the case wall (see Figs. 6' and'l).

some distance into the case ID. A" horizontal shaft zit-extends longitudinally through'the hub- 23' and its extension 25 and'continues outwardly from the case [0. An anti-friction bearing'21. in the carrier 2| and an anti-frictionbearing 28 inthe inner part of the extension 25 support'the shaftZfi for free rotation. The bearingllhas' 26 is held against.endwisemovement. A nut 33' is provided: on the inner extremity of the shaft Z-Batone'side ofsthe bearing 28 and a bushing or spacer 34 is provided on the shaft at the other side of theibearing 28- and these elements may assist in holding the shaft against endwise movement; A' worm 35 is'fixed or keyed on the shaft ZBatthe-end of the spacer 34 and meshes with a worm wheel siikeyed to a counter shaft 19% The under side of the hub extension 25 is open. to pass or admit-the, worm wheel 36. A geared drive 36 is provided between the counter shaft l9 and thecrank shaft I 9.

The power'means ordrive means ll further includes a pulley 3T rotatably supported on the projecting portion: of the clutch'shaft 26 attlie exterior of the case H). A belt 38 operates over the pulley '31.- and a pulley 39 fixed on the shaft of the motor M so that the pulley 31 is driven by the motor. The pulley 31 may be proportioned to serve as aafiy'wheel'and has a long hub 40 which surrounds the pro ecting" portion of. the

shaft 2'6 in spaced relation thereto. An antifriction bearing" ll rotatablysupports the inner portion of the pulley3l on theclutch shaft 26. The bearing 4| has shouldered engagement in the pulley 31 and has its inner'end engagedagainst the flange 32; An anti-friction bearing 42 is mounted on a reduced outer end portion of the clutch shaft 26 and rotatably carries the outer part of the pulley hub All. The inner side of'the bearing 42 engages against a shoulder-onthe shaft-25 and a nut l3 isprovided (in-the end The hub 23 has an inwardextension 25 which'proects of the shaft to retain the bearing 42 and to assist in preventing endwise movement of the pulley 37. A cap 44 may cover the nut 45. It is preferred to provide a sealing means or sealing assembly 45 on the above mentioned ring 29 to seal between the ring and the hub of the pulley 31 to retain lubricant Within the clutch assembly and to prevent the entrance of dirt into the assembly.

The clutch of the drive means it includes a sleeve 45 freely slidable on the shaft 26 and located between the nut 3i and the worm 35. An external annular groove 5? is provided in the sleeve 45. Fork means is provided for shifting the sleeve 45 back and forth. This means includes a shaft or pin 58 turnably carried by spaced lugs 49 on the upper side of the hub extension 25 (see Fig. '7) A fork is pivotally supported by the pin 48 between the lugs so and projects downwardly through an opening 5! in the upper wall of the extension 25. A yoke 52 is located between the arms of the fork and is pivotally secured thereto by pivot pins 53. The yoke 52 rides or engages in the groove ll of the sleeve 46. Manual means is provided for effecting longitudinal shifting of the sleeve A clutch handle or lever 55 is mounted on a side of the case I ii at a conveniently accessible point near the upper end of the case (see Fig. l). A suitable mechanical linkage 55 operatively connects the lever 54 with the fork 55. It will be seen how manual operation of the lever 55 will result in axial shifting of the sleeve 4% back and forth along the clutch shaft 26.

The clutch means further includes an assembly of friction discs 56 arranged within the outer portion of the pulley hub it and an operative connection between the shiftable sleeve 46 and the disc assembly for controlling or operating the latter. The discs 55 are disposed within a tubular shell 51 fixed in the pulley hub l6 and are engaged between spaced collars 58 secured on the shaft 26. Alternate discs 56 are keyed or fixed to the shaft 25 and alternate discs 56 are keyed or fixed to the shell 5?. that is. every other disc 56 is fixed to the shaft 26 and the other discs are fixed in the shell 5?. The discs 56 are adapted to freely pass one another Without engagement or appreciable friction when the clutch is re leased.

The mean for operating or controlling the clutch disc assembly 56 includes a sleeve 59 which freely surrounds the shaft 25 within the pulley hub 40. An inner sleeve to is spaced Within the sleeve 59 and is secured to the shaft 26 by a pin 6| or other means. The inner sleeve 65 carries one or more pivoted dogs 62 which are operable to compress the clutch disc assembly 56 to provide for the transmission of rotation between the pulley 3! and the clutch shaft 26. The dogs 62 act against the inner collar or ring 53. Outward movement of the outer sleeve 59 serves to actuate the dogs 62 to provide the clutching engagement at the discs 55. Pins project inwardly from the outer sleeve 53 and adapted to have camming engagement with the dogs 62 to' pivot or actuate the does when the sleeve 59 is shifted outwardly.

An operative connection is provided between the fork operated sleeve 46 and the dog actuating sleeve 59. The clutch shaft 25 is drilled or bored from its inner end to have longitudinal opening 64. A shift pin 65 is shiftable longitudinally in the opening 6 The shift pin 65 serves to transmit movement from the sleeve 56 to the sleeve 59. A longitudinal slot 661s provided in the shaft 26 to communicate with its opening 64 and a pin 61 is engaged in or secured to the sleeve 46 and engages with or is connected to the shift pin 65 to connect the yoke and shift pin. A longitudinal slot 68 is provided in the clutch shaft 26 at a point spaced outwardly from the bearing 4| and a pin 69 is secured to or carried by the outer shaft sleeve 59 and operates in the slot 68. In practice the pin 69 may pass completely through the slot 68 and through an opening in the shift pin 65. The pins 61 and 69 have sufficient longitudinal movement in their respective slots 66 and 68 to provide for movement of the sleeve 59 between the position where the clutch is released and the position where the clutch disc assembly 56 is engaged to transmit rotation from the pulley 3'! to the clutch shaft 26.

It is preferred to incorporate a brake means in the clutched drive so that the mechanism may be quickly stopped when the clutch is disengaged or released. This brake means may include a tubular brake ring 10 secured within the hub 23 and having shouldered engagement in the hub. The brake ring 16 has a tapered internal surface. The sleeve 46, which surrounds the clutch shaft 26 and which is operated by the fork and yoke assembly, carries a tapered or frusto-conical brake part II which is engageable in the ring 10 to brake or stop movement of the machine parts. It Will be seen that when the clutch handle or lever 54 is moved in one direction the sleeve 46 moves outwardly so that the shift pin 65 and outer sleeve 59 likewise move outwardly and upon outward movement of the sleeve 59 the pins 63 actuate the dogs 62 to engage the disc assembly 56 for the transmission of rotation from the pulley 31 to the shaft 26 and thu drive the crank shaft l9. Upon movement of the clutch lever 54 in the other direction the sleeve 46, the shift pin 65 and the sleeve 59 are moved inwardly to release the disc assembly 56 and thus disengage the clutch and the brake part ll is brought into cooperation with the brake ring iii to stop movement of the machine parts. It is to be understood that a suitable-switch means is provided for the control of the motor M.

The feed means l2 operates to intermittently advance or feed a web of paper or other material to the mechanism l3 which cuts the cup blanks therefrom and then forms the blanks into the completed cups. The feed means l2 embodies several important features of the invention. For example, it embodies means for supporting or employing a large-capacity supply roll 12 of waxed paper, or the like, and automatically intermittently withdraws a predetermined length of paper from this supply and delivers it to'the cutting and forming mechanism 13 in timed relation thereto. The feed means i2 is readily regulable to advance any desired amount or length of the paper or material to provide for the making of cups throughout a very wide range of cup sizes. This adjustment or regulation, together with appropriate changes in the dies of the mechanism 13, adapts the single machine for the manufacture of a Wide range of containers or cups. The feed means 52 operates in timed synchronism with the mechanism l3 and is positive and efficient in its feeding of the paper as the supply roll reduces in diameter until completely exhausted.

The feed means it includes a structure for supporting a supply of the material or paper of which the cups are to be formed. This structure may include a support or bracket I3 mounted on the front of 'the :case In and carrying a pair of -.out.- wardly oriforwardly projecting arms 14. Ahorizontalshaft .15 extends between andissupported by the outer portions of the rigid arms .14. The shaft 15 serves to carry the supply roll 12 of paper. The roll 12 comprisesa single continuous Web oriength of waxed paper or other. material of which the cups areto be formed. As illustrated, the shaft 75 is adapted-to carry-alarge supply roll 12. Adjustable spools 15 are provided onthe shaft -'l5.to center .and support the roll.12 (Fig. 3). It isto be understood that the roll '12 is readily replaced when exhausted, .The supply roll 12 is positioned sothat the web or :strip SJQf the paper passes from the upper portionofthe roll toward the front of the case'lfi;

Idler. means'is provided to prevent thedevelopmentlof slack. in the strip: S as it passesfrom'the 'roll 12 to the-feed means proper oftthe' machine. Apair of levers or arms Wis pivotally supported on the end portions of thezshaft'lfi and projects rearwardly toward the'case I'll. 5A shaft is-extends between the end po'rtions-of'the arms-ll and supports a freely rotatable roll 19. This roll M is in the nature of an idler :or tensioning-roll. The paper strip S'passes down under the'rolllg and continues back up to the feed means properiofithe machine. It is preferred to spring load'thearms "so that aroper tension'is maintained'on the strips and so that the paper will notbuckle or .develop excessiveslack. In the construction illustrated leaf springs 80 are secured'to the bracket arms I l and bear downwardly'onthe arms-Tl so that the idler roll'l'll is constantlyurged downward.

' The feed means 32 further includes a pair of spaced feed rolls 8! and 32'foradvancing. thestrip S across the-top of the machine (see Figs, 9 and 18). Mounting meansor brackets 83 and 8 2 are provided on the front and the rear walls, respectively, of the case l6 adjacent the top of the case .to carry the feed rolls 8! and 82 and the associated parts. The feed rolls 8! and 82 are carriedby horizontal shafts which are rotatably supported .by suitable bearings 85 on the'brackets B3. Itis preferred to face or cover the feed-rollstll and 82 with rubber or friction material to assure the positive advance of the paper strips. Inaccordance with the invention the'feed rolls. 8l and 82 are connected for simultaneous intermittent rota- -tion. A sprocket B5 is provided on an end ofeach feed roll 8! and S2 and an endless chain 61 operates over the two sprockets 86. The chainifi'lsis 'operated ordriven by thepower means by a'drive .to be described below.

A roll iifiis located above the forward'feed roll 8! to cooperate with-the .paper strip Sto maintainthe strip in frictional cooperation with the feedroll so thatthe strip is positively advanced. The roll'BB is carried by'a -shaft'89 which is eccentric with respect to its end portionstt (see Fig. 18). These end portions 96 are turnably mounted in suitable bearings till with the strip S by merely shifting or operating the handle 92. When the handle 92 is move'diin one direction the roll 88 is lowered to press against the strip S and thus maintain thestrip in-engagement with the forward feed roll 8! to be advanced bythe same. When the handle 92 is turned inl'the vother direction the roll 88 is raised from the strip -,S and the-strip is no'longer drivenor advanced by the roll 81. Thusthe movably supportedgroll '8 .88 forms a convenient means for initiating and stopping the advancement of the paper strips as required duringoperation ofthe machine. vA roll 93, similar to the roll 88,-isprovided above the rear reedzroll 82. The shaft of the roll 93v is carried by suitable bearings 94 on the rear bracket 84. The.

roll 93 has its axis paced forwardly from the axis of the rear=feedroll 92 so that it is particularly effective in maintaining the papervstrip S in engagementwith the-face of the:roll 82. It is preferred to face or coverthe-rolls88 and 93 with rubber or friction material. The rear driving roll orfeed roll 82 advances or ejects thescrap paper remaining after the cup-blanks have beencut fromtheistrip S by the'mechanlsm'lii.

The invention preferably includes means for aiding in removing or withdrawing the paper strip S; from the supply roll l2. This means includes a pair of arms '35 .pivotally supported byda pin 95 secured to the forward'bracket'83. The arms "95 project forwardly and downwardly to pass above the center of the supply roll 12 and are preferably :prises a fiat rubber belt 99 operated over the above described roll 83 and the roll 98. There may be'a single centrally disposed belt 99 engaged in annular groovesin the ro1-ls'88 and 98. The belt 99' passes over an idler pulley Hill on the pin 96 and engages: over a second idler l-lll spaced forwardly fr'omthepulleylfld The rubberbelt 99 is extensible and contractible to compensate for changes in the angular position of the arms 95 as the diameter of the supply-roll l2 grows less during. operation of. the machine. It will be seen that theforwardfeed roll Bl. drives the adjustable roll ilfi'and that the belt-9 operativelyconnects the roll 98-with the roll B8-so that the roll'f98 is effecively driven. The rotating roll 98 assists in rotat- ;ing the feedzroll '82 and in'advancing the paper strip-from the surface of the supplyzroll.

The drive for the feed means I2 is characterized by its adjustability whereby the material strip 8' may be advanced anyselected or required distance during each phase -ofoperation. The

drive for the feed means includes: a: walking beam 4-02 having one end supported by 'a' pivot .pin I93 fixed ona wall of thecase= Hl-(seeFig. 13). The

walking beam I02 is'arranged-within thelow-er portion 'of the case lfi'and isspaced-above the crank shaft l9. Thewalking beamllllextends in a. direction'transverse .of the crankshaft I9.

'A connecting-rod I04 has a bearing l'95'enga-ged on the intermediate crank I95 of the crankshaft '19 and has its other'end connectedwith the walking beam m2 by a pin! 01. During each revolutionof thee-crank shaft 19 the walking beamhZZ swings or pivots up and down. :A pain-of flexible elements or driving chains 103 is connected with the walking beam I02 and extends to a compound sprocket m9 positioned below and-adjacent the feed chain 81. I i

It is a feature of theinventionthat the-connectionof-the chains I08 withxthe walking beam 162 is adjustable along the beam to varyithe stroke or movement-of the .feedchain' 8? and, therefore, vary the extent-of advancement .of the strip 8. .Alongitudinakslot MD of substantial length is provided in the upper portion of the walking beam I02. A block I H is shiftable along the slot and carries a yoke II 2 which projects above the beam. The engagement of the block III in the slot Hi) holds the block against turning. A pin II3 passes through openings in the yoke H2 and carries an equalizing bar H4. The lower ends of the spaced chains I08 are anchored to the opposite end portions of the equalizing bar H4.

Accurate and conveniently operable means is provided for adjusting the block III along the slot I I to shift the point of connection of the chains I53 with the beam I02, moving this point of connection toward or away from the axis of A the walking beam I02 as required to regulate the stroke or advancement of the strip S. This adjusting means includes a screw II extending longitudinally through the slot H0 and having screw threaded engagement in an opening in the block III. The screw H5 is engaged in an opening H3 in the walking beam I02 to be held against longitudinal movement and has a head II? on its outer end exposed at the end of the beam 582 for ready engagement by a wrench or the like. A lock nut I I8 is threaded on the screw II 5 to normally lock or hold the screw against rotation. The screw head II! and the nut H3 are located to be readily engageable by a wrench or similar tool inserted through an opening in the rear wall of the case I0. It will be seen that upon loosening the nut I I8 the screw II 5 may be rotated to shift the block II'I toward or away from the pivotal axis of the walking beam I32 to shorten or lengthen the stroke or movement imparted to the chains I08.

The compound sprocket I09, which is best illustrated in Fig. 8 of the drawings, is a clutched sprocket for producing movement of the chain .ren turned by downward movement of the chains but which imparts no motion to the chain 8'? during the return stroke of the walking beam I32 and its chains I08. The sprocket I09 comprises two bolted together sections II9 provided at their outer ends with sprocket teeth I2 3. The chains I08 are trained over the series of teeth I23 and are anchored or fixed to tne sprocket Ila as at I 2| in Fig. 18. The sprocket sections H3 are tubular having a central longitudinal opening I22 which receives a horizontal shaft I23 with substantial clearance. The sprocket IE9 is supported on the shaft I23 by anti-friction bearings I24 so that it may have free rotation on the shaft. A central internal annular groove I25 is provided in the sprocket sections H9 and a ring I25 is nxed in the groove. The ring are has a series of annular internal pitched faces I27, each terminating in an abrupt shoulder I28. A collar I 29 is keyed to the shaft I23 within the sprocket I09 and has an annular enlargement or flange I30 which extends into the above mentioned groove I25. The flange I30 is provided with a finished cylindrical concentric peripheral surface. A ball or roller member I3I rides on each pitched surface I2! of the ring tit and the members are cooperable with the periphery of the flange I30. Springs I32 are engaged between the shoulders I28 and the members I3I to yieldingly urge the members to ride down the faces I 21 into cooperation with the peripheral surface of the flange I30. When the sprocket 539 is turned in a clockwise direction, as indicated by the arrow in Fig. 18, the members I3I are caused to ride inwardly on the surfaces 27 and thus almost immediately bind between provided on the shaft I23 between the bearing I33 and the adjacent bearing I24. The collar I29 within the sprocket I09 serves to space the two bearings I24 and the bearings have shouldered cooperation with the sprocket I09. A nut I30 is threaded on the shaft I23 and clamps against the outermost bearing I24. It will be seen that the structure just described serves to hold the clutched sprocket I09 against axial movement along the shaft I23.

The shaft I23 of the clutched sprocket I09 carries a sprocket I31 for driving the chain 81. The sprocket I 31 is keyed on the end portion of the shaft I23 which projects beyond the bearing I33. A screw I38 is threaded in the end portion of the shaft I23 and clamps a washer I39 against the hub of the sprocket I31 to hold the sprocket in against the bearing I33, which in turn bears inwardly against the spacer I35. A lubricant passage I40 leads inwardly through the shaft I23 from the outer end of the screw I38 to carry lubricant to the interior of the collar I29 which has a lubricant channel I M leading to the bearings I24.

The drive sprocket I37 keyed to the clutch shaft I23 is spaced below and forwardly of the rear feed roll 82 and an idler sprocket I42 is spaced below the feed roll sprocket 35 to direct the chain 87 over the drive sprocket I 31. The idler sprocket I42 has an eccentric shaft I43 carried by suitable bearings I44 on the rear case bracket 84 and the eccentric shaft may be adjusted or turned so that the idler sprocket I 42 takes up any slack that may develop in the chain 8'1. It will be seen that upon the downward stroke of the walking beam I02 that the chains I08 cause rotation of the sprocket I99 and this rotation is transmitted to the drive sprocket I31 through the clutch members I3I and the shaft I 23 so that the chain 81 is moved a given distance to advance a predetermined length or portion of the paper strip S to the cutting and cup forming mechanism I3.

Means is provided to turn back or return the clutched sprocket I09 during the upward strokes of the Walking beam I02. This means is preferably a spring means associated with the clutched sprocket I 35. In the preferred construction illustrated the spring return for the sprocket I09 includes an anchor block I45 secured in an opening MB of a flange or bracket I41 in the case I 0. The block I45 is tubular to receive the projecting end portion of the shaft I23 and the block I45 may be of sufficient length to partially telescope over the nut I33. A cup or flange I50 may be provided on the adjacent end of the sprocket I08 to telescope over the end portion of the anchor block I45 with substantial clearance. A coiled torsional spring I48 surrounds the anchor block 13 scribed above. The die I74 nests within the upper portion of the cutting ring I55 and has a flange I78 provided with openings which pass or receive the screws I57 (see Fig. 4).

The under side of the die I74 is dished, having a frusto-conical concave surface pitched upwardly and inwardly from the cutting ring I55 to the opening HE. A plurality of radial grooves I 79 is provided in the dished-under surface of the die I 74. The grooves I79 are equally circumferentialy spaced and are identical in size and shape. The radial grooves I79 preferably have flat downwardly convergent side walls and fiat bottom or upper walls which are pitched upwardly and inwardly toward the common vertical axis of the mechanism I3. The upper side of the lower flute forming die or punch I73 is formed to mate with or nest in the die I74 to press or form the flutes in the blank of the cup. The upper side of the punch I13 is frusto-conical, sloping upwardly and inwardly from its periphery to the central opening I75, A plurality of circumferentially spaced ribs I99 is provided on the upper side of the flute forming punch I79. The ribs I89 are identical in size and shape and are equally spaced one from the other, The grooves I19 and the ribs I89 are related so that the ribs I39 are adapted to enter the grooves to form the flutes in the paper blank. It will be seen that when the lower die or punch I I3 is pressed upwardly Within the stationary die I74 the grooves I79 and ribs I89 cooperate to form the flutes in the cup blank and the cooperation of the die and punch gives the blank its initial dished shape. It should be noted that the grooves I'l9 and ribs I89 diminish in depth as they extend inwardly and that they terminate some distance from the common vertical axis of the mechanism I3 leaving a plain or unfluted central portion in the blank.

The means for carrying and operating the flute forming punch I73 includes a cross head I9I disposed below the cross head IGI of the blank cutting means (see Fig. 4). The cross head I8I is flanged or reinforced and has a central vertical opening which receives a tubular upstanding column I82. A nut I83 may be threaded on the lower portion or the column I82 to clamp against the under side of the cross head I @I to secure the column to the head. The column I82 extends upwardly and is received within the tubular cross head I6I. A flange I84 on the upper end of the column I82 is slidably received within the collar I53. Screws I85 removably secure the die or punch I73 to the upper side of the flange I 84. The flange I84 and the punch I13 are effectively guided for vertical movement by the collar I 93 and the cutting sleeve I56.

Cam means associated with the crank shaft I9 is provided to operate the cross head I8! of the flute forming punch I73. Pairs of spaced adjacent push rods or operating rods I85 are fixed to lugs or enlargements on the ends of the cross head I8I (see Fig. 14). The rods I86 extend downwardly to adjacent the bull gears I6! and the lower ends of the adjacent rods I89 are connected by heads or tie members I87 (see Fig. 15). An annular cam I 88 is fixed to the inner side of each bull gear I67 within the outer cam I98. Each cam I88 has an outwardly projecting continuous cam track or cam ridge I89 and the tie members I87 on the rods I99 carry means for cooperating with these cam ridges. In practice, each tie member I87 carries an upper roller I99 for cooperating with the outer surface of a cam 14 ridge I89 and carries a lower roller I9I for co operating with the inner surface of the cam ridge I89. The rollers I99 and I9I are rotatably supported on shafts or pins I92 and I93, respectively, on the members I87. The cams I88 have identical shapes and setting and are formed to cause rather sudden or rapid upward and downward movement of the flute forming punch I73. The

. cooperation of the external surface of the cam ridges I89 with the rollers I99 produces the upward or active movement of the flute forming punch I73 and the engagement of the inner surfaces of the ridges I89 with the inner rollers I 9| produces the return or downward stroke of the punch. It will be seen that during each revolution of the crank shaft I9 the flute forming punch I'I3 is positively operated up and down so that the flutes are formed in the cup blank and the blank is given a dished configuration.

When the flutes have been formed in the blank by the punch I73 and die I74, as just described, the mechanism I3 operates to compress the flutes of the cup blank and to give the blank its final cup shape, the collapsing or compressing of the flutes permitting or providing for the forming of the cup C to the required shape and also giving the wall of the cup substantial rigidity. The mechanism I3 includes a pair of cooperating die elements for giving the cup blank its cup shape. The lower die element is in the nature of a punch I94 and the upper die element is a socket-like die I facing downwardly to receive the punch I94 (see Fig. 4). In accordance with the invention the punch I94 and the die I95 are in coaxial telescopic relation with the other cupcforming elements of the mechanism I3.

The cup forming die I94 is an elongate tubular member adapted to move up through the openings I76 and I77 with considerable clearance to enter or cooperate with the downwardly moving die I95 which is disposed above the plate I 52. The punch I99 has a cylindrical lower portion and its upper portion is shaped to give the wall of the finished cup C the desired configuration. In the preferred construction the upper portion of the punch I94 is round in cross section and its external surface I95 gradually slopes upwardly and inwardly. This external active surface I96 of the punch I94 is smooth and regular to engage within the cup C without marring or distorting the paper of the cup. As best illustrated in Figs. 16 and 17, an annular upwardly facing shoulder I97 occurs on the exterior of the pimch I 94 where the sloping surface I99 mates or joins the cylindrical surface on the lower portion of the punch I94. This shoulder I9! is preferably flat and occupies a plane normal to the longitudinal axis of the punch I94. The upper end of the punch I94 is flat and normal to its longitudinal axis except for a raised annular ridge I98 occurring at its periphery.

The cup forming punch I 94 is carried by a vertically movable rod or column 299 through the medium of a spring loaded slack connection. The column 290 has its lower portion received in a central opening 2m in a cross head 202 which is located below the crosshead I8I. A flange 293 on the column 299 engages against the upper side of the cross head 292 and a nut 294 is threaded on the column 209 to engage against the under side of the cross head 202 and thus secure the column to the cross head. The column 299 passes upwardly through the column I92 with ample clearance and is provided with a central longitudinal opening 295 which extends attested;

.-2,,.Q;5-and the stemis providedwitha central, longihe p o m n izpunc [59d is removably attached .to theupper endof :the slidable stem 296 to movetherewith. A screw ,298 is entered in the upper end of the punch :tudinal opening ,-2I)-'I.

1594 and its head has shouldered engagement 1 (Within. the punch. The screw-298 extendgbeyond .the lower end-of rthe punch L94. and isethreaded ;in-the opening :20? ;of the stem :206. .,-The screw 208 has shouldered cooperationwith-the .upper .portion ofthe stemyZflIi-at 299. ,Means iapro- .vided for limiting the-movement of the; stem 2 0,5 .and -punch I 96 relative .to the :column:= 2-Ii9. This ;means may include I a pin 2 It carried inaa trans.- verse opening-in the stem 296. II-he.pin,2 I 9 pro- ,jects .from oppositefsidespf the :stem 29.5.:and

:slots 2 in-thewall of the columniflfl In accordance :with the invention the .punch I94 is spring held or, springloaded, being urged .upwardly so that ;it is spaced some distance above the 1 upper endlof the column 200 when in its idleor unactuated condition. v The means for r-yi in ly r ing the-punc H4 upwardly mprises a coiled ispring .2 I 2 arranged within the opening 295 of .the column ,.2l9. .The spring 2 I 2 .is held under compression between the lower end of the .punch carrying stem 206 and .the -.upper end. ofaplugzwthreaded in the lowenend of ,-the column .269. ,Thespring 2I2 isnormallyun- .der. compression to holdtha punch J94 where: its lower end is spaced above-the upperendof the .columnilln but the springis .yieldable and is subject to ,further compression when v the punch I 9.4 is engagedinthedie.I.9.5..as-will bedater described. The. cupforming punch -I94is operated by the shaft -3 t9 through the medium. of prank pins and connecting rods. ,A crank pin. 2 I 4 projects .from the-outer side of ,each bullgear I-Ii'I (see Fig. 14). The pins 12:1 are .turnably engaged in openings -2 L5 in the .lower .ends of connecting rods lit. The, ends ofthecrosshead-JM are provided with outwardly projecting estudslor pins ,2I.I. These pins 2 I 'Iareturnably receivedin :openingsl I8 ,in theupperendsof theconnectingrodsllfi. .IIt

:will be seen how the crankrmeans just. described produces upward and .downward movement .of the cup forming punch;l,9,4lduring.each revolu- ,tion.,of the crank shaft. l in practice the parts may, be. related. so that the punch ,ISA .is. moving gupwardly during the .upward actuation of the extends into diametrically opposite longitudinal I 'flute-jformingpunch. I33 and the upper. end ofthe punch I94 .may be in. a plane. at the upper end of the ,groovedactive ,face of the die 11.4 when .the flute torn ring operation, is completed. ,Im- .me'diat'ely thereafter the.,fluteformingpunch I89 moves downwardly to free the cup blankand the punchlefi continues upwardlytopush the cup blank-upwardly fromthe die I'M. ,In this connectionitis to be. observed that the inner corners or jfaces ,of the flute forming die I14 maybe 1 rounded or bevelledofi so that the cup-'blankis ;not injured or distored when the punch I94draws it upwardly, out ofthedie I14.

.The cup forming die .I,95. is removably carried .by-acrQSs-head 2L9 disposed above the case III rand spaced above the -plate;t52. Azcarrier 220 gisibolted or other-wise secured-to the under side ref :th ross --hea 1-2 It -.-an ;p f i d wnwa dl toward ;the, .p1ate I52. The ;carrier 220 has-1a asecket 221 in its; lower .side '1 whose lon itudinal ,axisis co ce tric with the commQu-axisp -th e lemmentsof-thame h n s 3- happening222 of reduced diameter -continues upwardly through the carrier 7221) from the socket :22. Thecup forming die I is centrally and'vertically disposed within the socket 22I. The die E95 .is-a tubular member receivedin the socket ZZI with ample clearance and the upper endof the-die I95, has an inturnedhead or flange 223 presenting an end of increased. area which bears .on theend wall of-thesocket. The exterior .of I

theme-I 95 is cylindrical and of;uniform diameter throughout.

The interior of the die I95 has anaotive cup :shaping surface 22E corresponding in configurationto the surface I95. The surface 224 slopes downwardly and outwardly to the lowerend. 225 of the die 95. The lower end 225 of the die I95 .isflat andlies ina horizontal plane. The end surface 225 is adapted to directly oppose the shoulder I9? of thepunch I94 to'iorm a step.or shoulder '22don the cup ,0 (see Figs. 27 and 28)... The cup shaping surface 22 t of the die I95 has substantially the same inclination as the cup shaping surface I36 of the punch I94, and when the die and punch are cooperating the wall ofthe cup (3 is given its final flaring configuration by these cooperating surfaces. Furthenit will be observed that the cooperating active surfaces of the punch .idil and die I95 compress the fluted wall of the .cup blank and the flutes are converted into pleats or folds of double thickness, thus materially increasing thestrength and stability of the cup. The die I95 may be secured in the carrien-ZZQ by. a bushingfl'i which extends through the opening 2220f the carrier 229. The bushing 22? extends downwardlyinto the die, I95

and has a;fla nge 229 on itslower end which bears upwardlya ain h fia 2 of edi 95 to clamp the die upwardly against the upper wall of the socket 22!. The bushing .221 projects upwardly beyond theupper end of the carrier 22 0 and an-elongated cap 229 is threaded onthe projecting. portion of the bushing and clamps against bar 232. The bar 232 is provided at its underside i with pairs of downwardly projecting ears r233. Horizontal pins 2% are carried in openings in the upper ends of the connecting rods 239 toconnect the-rods with. the traveling bar 232. -Ro-ds,2;3,5;are

attached to theendportions-of the traveling .bar

2S2 byscrews 236 and extend upwardly to the "cross head 2I9. As illustratedin 14 of the drawings the rods 2 35 mayslidably; passthrough openings 23? provided in thickened end portions of the crosshead 2.92. This ,assistsin guiding and steadying therods235. The rods 235are further guided by bushings-,-238, secured in openingg23 in-t-heupper Wall-of, thecase Ill. The upper ends of the spafied verticalrodsi 3.5 earrythe cross head -1 is. It w l be nth tthecross head 2 ca r ing thedie .195 vmoves up-',=and down'through; a :QQI P E cy dur ng -.each revolution set the 

